IZ71984: LINUX/POWER6 WEBSPHERE NODEAGENT SHOWS CONSTANT HIGH CPU (ABOUT 25%)AFTER APPLYING JAVA 5 SR9

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: The WebSphere nodeagent on Linux Power 6 machine
    shows constant high CPU (about 25%).
      If verbose GC is turned on, the verbose GC log shows the GC is
    invoked almost every half second.
      If the trace com.ibm.ws.management.nodeagent.PidWaiter is
    turned on, the trace log for the nodeagent indicates the
    PidWaiter appears to be pinging servers about 22.5k times a
    minute.
    .
    Stack Trace: N/A
    .
    

Local fix

Problem summary

  • The problem is caused by the fact that the VM assembly code
    calls a libc function (sleep) with a mis-aligned native stack.
    

Problem conclusion

  • This defect will be fixed in:
    5.0.0 SR12
    6.0.0 SR8
    .
      Sufficient alignment in the native stack is now maintained.
    .
    To obtain the fix:
    Install build 20100307 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ71984

  • Reported component name

    JAVA 5 J9 COMMO

  • Reported component ID

    620500127

  • Reported release

    500

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-03-06

  • Closed date

    2010-03-09

  • Last modified date

    2010-03-23

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    IZ72060

Fix information

  • Fixed component name

    JAVA 5 J9 COMMO

  • Fixed component ID

    620500127

Applicable component levels

  • R500 PSN

       UP



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Document information


More support for:

Runtimes for Java Technology
Virtual Machine

Software version:

5.0

Reference #:

IZ71984

Modified date:

2010-03-23

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